3M 4991 DATA SHEET
VHB Acrylic Foam Tape 4991
Product Data Sheet
Updated : Sept. 2002
Supersedes : February 2001
Product Description
3M VHB Acrylic Foam Tape 4991 is a double coated 0.090 in. (2.3 mm) pres sure
sensitive adhesive tape for bonding many painted metals, as well as unpainted metals,
and higher surface energy plastics. 3B VHB Acrylic Foam Tape 4991 is appropriate for
applications which demand a thicker conformable products.
Physical Properties
Not for specification purposes
Adhesive Type
Plasticiser Resistant
Thickness (ASTM D-3652)
2.3 mm
Foam Density
720 kg/m³
Adhesive Carrier
Acrylic Foam (Closed Cell)
Liner
Red Polyethylene Film
Tape Colour
Grey
Shelf Life
24 months from date of manufacture when stored in the
original carton at 20°C & 50 % Relative Humidity
Performance
Characteristics
Not for specification purposes
Peel Adhesion to
Stainless Steel
35 N/10mm
Static Shear Strength
(Stainless Steel)
1000 g @ 22°C
500 g @ 66°C
500 g @ 93°C
Temperature
Performance
Max (minutes/hours)
Max Continuous
(days/weeks)
120 °C
90 °C
Normal Tensile
(Aluminium T-Block)
415 kPa
Solvent Resistance
High
2
Date : Sept. 2002
VHB Acrylic Foam Tape
4991
Additional Product
Information
For maximum bond strength the surfaces should be thoroughly cleaned with a 50:50
mixture of isopropyl alcohol and water. Consult manufacturers directions for use and
precautions when using cleaning solvents. Ideal tape application is accomplished when
temperature is between 20°C and 40°C and the bond is allowed to dwell 72 hours. Initial
tape application to surfaces at temperatures below 10°C is not recommended.
3M and VHB are trademarks of the 3M Company.
Values presented have been determined by standard test methods and are average values not to be used for specification purposes.
Our recommendations on the use of our products are based on tests believed to be reliable but we would ask that you conduct your
own tests to determine their suitability for your applications.
This is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a result of our
recommendations.
Tapes & Adhesives
3M United Kingdom PLC 1996
3M United Kingdom PLC
3M House,
28 Great Jackson Street,
Manchester,
M15 4PA
Product Information :
Tel 0870 60 800 50
Fax 0870 60 700 99
3M Ireland
3M House, Adelphi Centre,
Upper Georges Street,
Dun Laoghaire,Co. Dublin,
Ireland
Customer Service :
Tel (01) 280 3555
Fax (01) 280 3509
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